Observations

Description

Valves are linear with cuneate to subrostrate apices. The keel is strongly excentric, with fibulae numbering 6-8 in 10 µm. Striae faintly visible to unresolvable.

Inspection of the holotype slide, and other slides from the type locality, have revealed specimens as small as 25 µm in length. Note that the original description documented a range of 50-75 µm in length (Sovereign 1958, p. 131).